// 3.6 Mathematical Library Functions 


#include <stdio.h>
#include <math.h>

int main()
{
    int height;
    double time;

    height = 200.0;
    time = sqrt (2.0*height/9.8);

    printf("It will take %f seconds",time);
    printf(" to fall %d meters.\n",height);
     
    return 0;
}